20 November 2002 Feasibility study for parallel recording and retrieving of data by near-field holographic method
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Abstract
We present experimental results showing the feasibility of parallel recording and reading of near-field holograms and also of fast data access time using a Si nanometric aperture array. We uses a Si(100) wafer and its anisotropic wet etching for the fabrication of nanometric aperture array. Then, this fabricated aperture array is applied to the storage and reading of binary near-field holograms using the near-field components generated at the aperture as object waves. A brief analysis on the amount of these evanescent components has been presented using the modified Bethe and Bouwkamp's formulation. Two near-field holograms are recorded in parallel and retrieved sequentially successfully with the array in contact with the surface of the photorefractive crystal, which shows the feasibility of parallel recording and reading of near-field holograms. The data access speed (reading speed) can be improved by more than 100 times compared with the case in which a fiber tip of the NSOM records and reads the near-field hologram.
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Byoungho Lee, Jingu Kang, Kyoung-Youm Kim, "Feasibility study for parallel recording and retrieving of data by near-field holographic method", Proc. SPIE 4803, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VIII, (20 November 2002); doi: 10.1117/12.452629; https://doi.org/10.1117/12.452629
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